package com.sky.service.impl;

import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
public class UserServiceImpl implements UserService {

    /**
     * 微信服务接口地址
     */
    private static final String WX_LOGIN_URL = "https://api.weixin.qq.com/sns/jscode2session";

    @Autowired
    private WeChatProperties weChatProperties;
    @Autowired
    private UserMapper userMapper;

    /**
     * 微信登录
     *
     * @param userLoginDTO
     * @return
     */
    @Override
    public User wxlogin(UserLoginDTO userLoginDTO) {
        //获取openid
        Map<String, String> map = new HashMap<>();
        map.put("appid", weChatProperties.getAppid());
        map.put("secret", weChatProperties.getSecret());
        map.put("js_code", userLoginDTO.getCode());
        map.put("grant_type", "authorization_code");
        String openid = HttpClientUtil.doGet(WX_LOGIN_URL, map);
        //解析是否有openid，没有抛异常
        if (StringUtils.isEmpty(openid)) {
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        //根据openid获取用户信息，判断是否已经存在，如果不存在，则注册
        User user = userMapper.getUserByOpenid(openid);
        if (user == null) {
            user = User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            //注册用户信息(需要获取用户id，在xml文件中操作)
            userMapper.insert(user);
        }
        return user;
    }


}
